Title :
A DC design of an X-band traveling-wave tube
Author :
Xavier, Cesar C. ; Motta, Claudio C.
Author_Institution :
Nucl. & Energy Res. Inst., Sao Paulo, Brazil
Abstract :
In this paper a dc design procedure of a X-band traveling-wave tube is described. This procedure consists in determine the geometry of the electron gun, the periodic permanent magnetic and the electron collector. It was found that an electron gun with a 0.26 μPerv, 9.1 kV, 225 mA and 0.6 mm beam radius without electrostatic beam control was suitable for this design. The PPM, constructed with samarium-cobalt magnetics shown a good agreement with theoretical design. Finally a three stage depressed collector, to recover part of non-used electron energy and improve the overall electronic efficiency of TWT, is presented. The simulations were run with Particle-in-cell Studio.
Keywords :
electron guns; microwave tubes; permanent magnets; travelling wave tubes; X-band traveling-wave tube; current 225 mA; dc design procedure; electron collector; electron gun geometry; electronic efficiency; particle-in-cell simulations; periodic permanent magnetic; samarium-cobalt magnetics; voltage 9.1 kV; Cathodes; Electron beams; Electron tubes; Magnetic circuits; Magnetic fields; Magnetic flux; Materials; Traveling wave tubes; depressed collectors; electron gun; periodic permanent magnets;
Conference_Titel :
Microwave & Optoelectronics Conference (IMOC), 2013 SBMO/IEEE MTT-S International
Conference_Location :
Rio de Janeiro
DOI :
10.1109/IMOC.2013.6646550
